About William Martin
William Martin Zimmerman is a licensed attorney admitted to practice law in the State of California. He was admitted to the California State Bar in 1986. His license is currently in active status. Mr. Zimmerman is a partner at Pisegna & Zimmerman, a law firm located in Sherman Oaks, California. He has been practicing law for over 39 years, serving clients throughout Los Angeles, San Bernardino, and Orange Counties.
Mr. Zimmerman earned his Juris Doctor degree from the San Fernando College of Law, now known as the University of La Verne College of Law, where he graduated in 1985. Prior to law school, he completed his undergraduate education at California State University, Northridge, receiving a Bachelor of Science degree. During his time at law school, he was actively involved in various legal clinics and internships, gaining practical experience in the field.
Mr. Zimmerman concentrates his practice in the areas of Social Security Disability Law and Personal Injury. He represents clients seeking Social Security benefits, handling cases from the Administrative Law level up to the District Court. His personal injury practice includes representing clients who have been injured in car accidents or suffered other types of personal injuries. His practice encompasses all stages of litigation, including initial case evaluation, discovery, mediation, settlement negotiations, and trial proceedings in both state and federal courts.
Throughout his career, Mr. Zimmerman has handled cases in the Superior Court of California for the County of Los Angeles, the United States District Court for the Central District of California, and the United States Court of Appeals for the Ninth Circuit. He has also appeared before the California Court of Appeal on multiple occasions. Prior to founding his own firm, he worked as an associate at a mid-size litigation firm in Century City for five years.
Mr. Zimmerman is an active member of the California State Bar Association and the National Organization of Social Security Claimants’ Representatives. He is also a member of the Los Angeles County Bar Association. He is fluent in English, allowing him to serve the diverse communities of Southern California effectively.
